<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
    /*     //100的求和
        function sum(){
            let result = 0;
            for (let i =0; i <= 100;i++){
                result = result + i;
            }
console.log(result);
        }
        sum(); */
        function jinzita(){
        var str = '';
        for (var i = 1; i < 10; i++) {
            for (var j = 1 ; j <= i ; j++){
                str = str + ( i + '*' + j + '=' + i * j  + ' ');
            }
            str += '\n';
        }
        alert(str)
        }
        jinzita(); // 调用上面的
    </script>
</body>
</html>